import redef find_substring_regex(s, sub):""" 使用正则表达式查找子字符串 """ pattern = re.compile(sub)if pattern.search(s):return Trueelse:return False# 定义一个字符串string = 'A New String Hello, World!'sub_string = "Hello, World!"print('例1，源字符串为：', string, ' ...
if any(substring in my_str for substring in my_list): # 👇️ this runs print('The string contains at least one element from the list') else: print('The string does NOT contain any of the elements in the list') 1. 2. 3. 4. 5. 6. 7. 8. 9. 如果需要检查列表中的任何元素...
Note that find() function returns the index position of the substring if it’s found, otherwise it returns -1. Count of Substring Occurrence We can usecount() functionto find the number of occurrences of a substring in the string. s = 'My Name is Pankaj' print('Substring count =', s...
string ='Hello World, this is a string' # The substring we are looking for substring ='this' print(string.find(substring) # print:13, 13是字字符串的起始位置 使用正则表达式 re.search() 正则表达式是Python中非常强大的一个模块,我们用正则表达式同样可以查找子字符串(有点杀鸡用牛刀的感觉)以下是...
String: astring = 'i am a string' 'a' in astring # True 'am' in astring # True 'I' in astring # False Set: aset = {(10, 10), (20, 20), (30, 30)} (10, 10) in aset # True 10 in aset # False Dict: dict有点特殊: in关键字参数只检查键。如果你想搜索值,你需要指定.va...
Using the Python string index method The last method to check for a substring we used returned a Boolean value. This will work well in your code if all you need to know is if the substring simply exists in the string. But if you need to know the substring’s location in the string,...
# The string string = 'Hello World, this is a string' # The substring we are looking for substring = 'this' print(string.find(substring) # print:13, 13是字字符串的起始位置 使用正则表达式 re.search() 正则表达式是Python中非常强大的一个模块,我们用正则表达式同样可以查找子字符串(有点杀鸡用...
In this quiz, you'll check your understanding of the best way to check whether a Python string contains a substring. You'll also revisit idiomatic ways to inspect the substring further, match substrings with conditions using regular expressions, and search for substrings in pandas. ...
ValueError: substring not found >>> str.index("n") #同find类似,返回第一次匹配的索引值 4 >>> str.rindex("n") #返回最后一次匹配的索引值 11 >>> str.count('a') #字符串中匹配的次数 0 >>> str.count('n') #同上 2 >>> str.replace('EAR','ear') #匹配替换 'string learn' >...
tutorial, I have explained how tocheck if a string contains a substring in Pythonusing different methods, such as theinoperator,find(),index(), orcount()method, etc. I hope all these examples I explained here will be helpful to you. I always recommend using the in operator for this ...